1 //===-- Unittests for sin -------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/__support/FPUtil/FPBits.h" 10 #include "src/math/sin.h" 11 #include "test/UnitTest/FPMatcher.h" 12 #include "test/UnitTest/Test.h" 13 #include "utils/MPFRWrapper/MPFRUtils.h" 14 15 using LlvmLibcSinTest = LIBC_NAMESPACE::testing::FPTest<double>; 16 17 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 18 19 using LIBC_NAMESPACE::testing::tlog; 20 21 TEST_F(LlvmLibcSinTest, TrickyInputs) { 22 constexpr double INPUTS[] = { 23 0x1.5f09cad750ab1p+3, 0x1.fff781921b61fp15, -0x1.f635b70b92407p-21, 24 -0x1.3ecf146c39c0cp-20, 0x1.6ac5b262ca1ffp849, 0x1.6c6cbc45dc8dep5, 25 0x1.921fb5443p-7, 0x1.940c877fb7dacp-7, 0x1.fffffffffdb6p24, 26 0x1.fd4da4ef37075p29, 0x1.b951f1572eba5p+31, 0x1.55202aefde314p+31, 27 0x1.85fc0f04c0128p101, 0x1.7776c2343ba4ep101, 0x1.678309fa50d58p110, 28 0x1.fffffffffef4ep199, -0x1.ab514bfc61c76p+7, -0x1.f7898d5a756ddp+2, 29 -0x1.f42fb19b5b9b2p-6, -0x1.14823229799c2p+7, -0x1.0285070f9f1bcp-5, 30 0x1.23f40dccdef72p+0, 0x1.43cf16358c9d7p+0, 0x1.addf3b9722265p+0, 31 0x1.48ff1782ca91dp+8, 0x1.a211877de55dbp+4, 0x1.dcbfda0c7559ep+8, 32 0x1.1ffb509f3db15p+5, 0x1.2345d1e090529p+5, 0x1.ae945054939c2p+10, 33 0x1.2e566149bf5fdp+9, 0x1.be886d9c2324dp+6, -0x1.119471e9216cdp+10, 34 -0x1.aaf85537ea4c7p+3, 0x1.cb996c60f437ep+9, 0x1.c96e28eb679f8p+5, 35 -0x1.a5eece87e8606p+4, 0x1.e31b55306f22cp+2, 0x1.ae78d360afa15p+0, 36 0x1.1685973506319p+3, 0x1.4f2b874135d27p+4, 0x1.ae945054939c2p+10, 37 0x1.3eec5912ea7cdp+331, 0x1.dcbfda0c7559ep+8, 0x1.a65d441ea6dcep+4, 38 0x1.e639103a05997p+2, 0x1.13114266f9764p+4, -0x1.3eec5912ea7cdp+331, 39 0x1.08087e9aad90bp+887, 0x1.2b5fe88a9d8d5p+903, -0x1.a880417b7b119p+1023, 40 -0x1.6deb37da81129p+205, 0x1.08087e9aad90bp+887, 0x1.f6d7518808571p+1023, 41 -0x1.8bb5847d49973p+845, 0x1.f08b14e1c4d0fp+890, 0x1.6ac5b262ca1ffp+849, 42 0x1.e0000000001c2p-20, 43 }; 44 constexpr int N = sizeof(INPUTS) / sizeof(INPUTS[0]); 45 46 for (int i = 0; i < N; ++i) { 47 double x = INPUTS[i]; 48 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x, 49 LIBC_NAMESPACE::sin(x), 0.5); 50 } 51 } 52 53 TEST_F(LlvmLibcSinTest, InDoubleRange) { 54 constexpr uint64_t COUNT = 1'234'51; 55 uint64_t START = LIBC_NAMESPACE::fputil::FPBits<double>(0x1.0p-50).uintval(); 56 uint64_t STOP = LIBC_NAMESPACE::fputil::FPBits<double>(0x1.0p200).uintval(); 57 uint64_t STEP = (STOP - START) / COUNT; 58 59 auto test = [&](mpfr::RoundingMode rounding_mode) { 60 mpfr::ForceRoundingMode __r(rounding_mode); 61 if (!__r.success) 62 return; 63 64 uint64_t fails = 0; 65 uint64_t count = 0; 66 uint64_t cc = 0; 67 double mx, mr = 0.0; 68 double tol = 0.5; 69 70 for (uint64_t i = 0, v = START; i <= COUNT; ++i, v += STEP) { 71 double x = FPBits(v).get_val(); 72 if (FPBits(v).is_nan() || FPBits(v).is_inf()) 73 continue; 74 LIBC_NAMESPACE::libc_errno = 0; 75 double result = LIBC_NAMESPACE::sin(x); 76 ++cc; 77 if (FPBits(result).is_nan() || FPBits(result).is_inf()) 78 continue; 79 80 ++count; 81 82 if (!TEST_MPFR_MATCH_ROUNDING_SILENTLY(mpfr::Operation::Sin, x, result, 83 0.5, rounding_mode)) { 84 ++fails; 85 while (!TEST_MPFR_MATCH_ROUNDING_SILENTLY(mpfr::Operation::Sin, x, 86 result, tol, rounding_mode)) { 87 mx = x; 88 mr = result; 89 90 if (tol > 1000.0) 91 break; 92 93 tol *= 2.0; 94 } 95 } 96 } 97 if (fails) { 98 tlog << " Sin failed: " << fails << "/" << count << "/" << cc 99 << " tests.\n"; 100 tlog << " Max ULPs is at most: " << static_cast<uint64_t>(tol) << ".\n"; 101 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, mx, mr, 0.5, rounding_mode); 102 } 103 }; 104 105 tlog << " Test Rounding To Nearest...\n"; 106 test(mpfr::RoundingMode::Nearest); 107 108 tlog << " Test Rounding Downward...\n"; 109 test(mpfr::RoundingMode::Downward); 110 111 tlog << " Test Rounding Upward...\n"; 112 test(mpfr::RoundingMode::Upward); 113 114 tlog << " Test Rounding Toward Zero...\n"; 115 test(mpfr::RoundingMode::TowardZero); 116 } 117